How to use the pdf watermark?

Similarly, as there are diverse levels of security for critical archives, for example, travel papers, bits of personality, and fiscal items, the substance inside a PDF is additionally treated with a similar significance. The significant worry for the PDF is security against modification and abuse. For more details, visit the given link.https://www.evernote.com/shard/s464/sh/d3e01897-ad3f-4b74-9848-916776515be7/aa5ef9810e539e80d1d3dcd7e7a6c2ea